SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6cef673799e3f79b440a5ff6f20f0a5c5a11fbb709550a3b72c17586d8434d25' 
  AND token = 'qhPtkN9biFaDxgUaYNszyn6F8jogVsqF8XK+32/zip4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}